NCERT Class 12 Biology Chapter 12 Ecosystem Test Mock Test
This free online test covers Chapter 12, Ecosystem, from the NCERT Class 12 Biology textbook. The 30 questions are written directly from the chapter — definitions, processes, worked examples and the points the book italicises — so a score here tells you how much of the chapter actually stuck, not how well you guess. Each answer carries an explanation that says why the right option is right and why the other three fail, which is where most of the learning happens. Attempt it after your first read of the chapter, then again before the exam. There is no negative marking, and you can review the full solution the moment you submit.
Duration
30 mins
Questions
30 MCQs
Total Marks
30 pts
Negative
0 per wrong
Topics Covered in This Paper
Sample Questions
Q1.An ecosystem is best described as:
- AThe vertical distribution of species occupying different levels of a habitat
- BA functional unit of nature where living organisms interact among themselves and with the surrounding physical environment
- CThe total number of plant and animal species present in a habitat
- DA group of individuals of one species sharing resources in a defined area
Q2.Stratification in an ecosystem refers to:
- AThe horizontal spread of a species across a geographical area
- BThe arrangement of organisms according to their feeding relationships
- CThe identification and enumeration of the plant and animal species present
- DThe vertical distribution of different species occupying different levels, as when trees occupy the top layer of a forest and herbs and grasses the bottom
Q3.The four aspects in which the components of an ecosystem are seen to function as a unit are:
- ASpecies composition, stratification, food chains and food webs
- BFragmentation, leaching, catabolism and humification
- CProductivity, decomposition, energy flow and nutrient cycling
- DNatality, mortality, immigration and emigration
Before you begin
The test will auto-submit when the timer runs out.
Each correct answer carries +1 marks.
Each wrong answer carries -0 marks.
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Disclaimer: The questions provided here are extracted and digitized from previous year papers using automated processes. They may contain typographical errors, formatting issues, or minor variations from the actual examination paper. While we have done our best to verify the accuracy of the official answer keys, discrepancies may occasionally exist. Please refer to the official commission website for the most authentic paper.
Timer starts immediately and keeps running even if you close the tab. Make sure you have 30 uninterrupted minutes.
FAQ
Frequently asked questions
Frequently Asked Questions
- How many questions are in the NCERT Class 12 Biology Chapter 12 Ecosystem Test mock test?
- This paper has 30 multiple-choice questions carrying 30 marks in total, to be attempted in 30 minutes.
- Is the NCERT Class 12 Biology Chapter 12 Ecosystem Test mock test free to attempt?
- Yes. You can attempt the full paper online for free on AI Test Planet, and see your score and correct answers immediately after submitting.
- Does this paper have negative marking?
- No, there is no negative marking on this paper, so an attempted guess costs you nothing.
- Are solutions and explanations available?
- Yes. After you submit, every question shows the correct answer with a step-by-step explanation, along with a topic-wise breakdown of your performance.